MBRB1045G Schottky Diode Equivalent & Substitute Parts

Part Overview

The MBRB1045G is a Schottky rectifier diode manufactured by onsemi, rated for 45 V DC reverse voltage and 10 A average rectified current in a surface mount D2PAK package. This component is classified as obsolete product status. Locating equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this Schottky diode topology.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	45 V
Current - Average Rectified (Io)	10 A
Voltage - Forward (Vf) (Max) @ If	840 mV @ 20 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	100 µA @ 45 V
Mounting Type	Surface Mount
Package / Case	TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
Operating Temperature - Junction	-65°C ~ 175°C
Technology	Schottky
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the MBRB1045G are identified based on strict parametric equivalence across all critical electrical and mechanical specifications. The substitution logic requires exact matching of the following parameters:

Voltage - DC Reverse (Vr) (Max): 45 V
Current - Average Rectified (Io): 10 A
Voltage - Forward (Vf) (Max) @ If: 840 mV @ 20 A
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr: 100 µA @ 45 V
Package / Case: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
Operating Temperature - Junction: -65°C ~ 175°C
Technology: Schottky
Mounting Type: Surface Mount

Parts meeting all these criteria are classified as parametric equivalents and direct substitutes. No deviations from specified parameters are permitted for substitution classification.

Parameter Comparison

Parameter	MBRB1045G	SBRB1045G
Manufacturer	onsemi	onsemi
Category	Diodes, Rectifiers	Diodes, Rectifiers
Description	DIODE SCHOTTKY 45V 10A D2PAK	DIODE SCHOTTKY 45V 10A D2PAK
Series	SWITCHMODE™	SWITCHMODE™
Product Status	Obsolete	Obsolete
Technology	Schottky	Schottky
Voltage - DC Reverse (Vr) (Max)	45 V	45 V
Current - Average Rectified (Io)	10 A	10 A
Voltage - Forward (Vf) (Max) @ If	840 mV @ 20 A	840 mV @ 20 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	100 µA @ 45 V	100 µA @ 45 V
Mounting Type	Surface Mount	Surface Mount
Package / Case	TO-263-3, D2PAK (2 Leads + Tab), TO-263AB	TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
Operating Temperature - Junction	-65°C ~ 175°C	-65°C ~ 175°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected
ECCN	EAR99	EAR99
HTSUS	8541.10.0080	8541.10.0080

Engineering Selection Recommendations

The SBRB1045G is a direct parametric equivalent to the MBRB1045G. Both components are manufactured by onsemi within the SWITCHMODE™ series and share identical electrical specifications, package configuration, and compliance certifications.

Both parts carry obsolete product status. The SBRB1045G maintains current inventory availability (20,100 pieces) compared to the MBRB1045G (1,970 pieces), providing improved supply chain continuity for ongoing applications.

Both components are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99. Moisture sensitivity level is rated at MSL 1 (Unlimited) for both parts, indicating no moisture-related handling restrictions during storage or assembly.

Selection between these parts is determined by inventory availability and supply chain logistics rather than technical performance differentiation.

Frequently Asked Questions (FAQ)

Q: Can the SBRB1045G replace the MBRB1045G in existing designs?

A: Yes. The SBRB1045G is a parametric equivalent with identical electrical ratings (45 V reverse voltage, 10 A average rectified current, 840 mV forward voltage at 20 A), matching fast recovery speed characteristics, and identical D2PAK package configuration. No circuit modifications are required.

Q: Are there package compatibility concerns when substituting these parts?

A: No. Both the MBRB1045G and SBRB1045G use the TO-263-3 D2PAK package with identical pinout and thermal characteristics. PCB footprints and assembly processes remain unchanged.

Q: What is the significance of the different base part numbers (MBRB versus SBRB)?

A: The base part number prefix indicates internal onsemi product line differentiation. Both MBRB1045 and SBRB1045 series maintain identical electrical and mechanical specifications for the 45 V, 10 A Schottky diode rating. The substitution is valid based on complete parametric matching.

Q: Do both parts meet the same compliance and regulatory requirements?

A: Yes. Both the MBRB1045G and SBRB1045G are ROHS3 compliant, REACH unaffected, and carry identical ECCN (EAR99) and HTSUS (8541.10.0080) classifications. Moisture sensitivity level is MSL 1 (Unlimited) for both parts.

Q: Why is the SBRB1045G recommended despite both parts being obsolete?

A: The SBRB1045G offers superior supply chain availability with 20,100 pieces in current inventory versus 1,970 pieces for the MBRB1045G. For applications requiring component replenishment or production continuation, the SBRB1045G provides practical sourcing advantages while maintaining complete technical equivalence.

Q: Are there any thermal or performance differences between these parts?

A: No. Both parts share identical operating temperature range (-65°C to 175°C junction temperature), reverse leakage current (100 µA @ 45 V), and fast recovery speed characteristics (≤ 500ns, > 200mA). Thermal performance in D2PAK packaging is equivalent.

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